/*
* 
* TableSorter 2.0 - Client-side table sorting with ease!
* Version 2.0.3
* @requires jQuery v1.2.3
* 
* Copyright (c) 2007 Christian Bach
* Examples and docs at: http://tablesorter.com
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
* 
*/
(function ($) {
    $.extend({
        tablesorter: new function () {

            var parsers = [], widgets = [];

            this.defaults = {
                cssHeader: "header",
                cssAsc: "headerSortUp",
                cssDesc: "headerSortDown",
                sortInitialOrder: "asc",
                sortMultiSortKey: "shiftKey",
                sortForce: null,
                sortAppend: null,
                textExtraction: "simple",
                parsers: {},
                widgets: [],
                widgetZebra: { css: ["", "stripe"] },
                headers: {},
                widthFixed: false,
                cancelSelection: true,
                sortList: [],
                headerList: [],
                dateFormat: "us",
                decimal: '.',
                debug: false
            };

            /* debuging utils */
            function benchmark(s, d) {
                log(s + "," + (new Date().getTime() - d.getTime()) + "ms");
            }

            this.benchmark = benchmark;

            function log(s) {
                if (typeof console != "undefined" && typeof console.debug != "undefined") {
                    console.log(s);
                } else {
                    alert(s);
                }
            }

            /* parsers utils */
            function buildParserCache(table, $headers) {

                if (table.config.debug) { var parsersDebug = ""; }

                var rows = table.tBodies[0].rows;

                if (table.tBodies[0].rows[0]) {

                    var list = [], cells = rows[0].cells, l = cells.length;

                    for (var i = 0; i < l; i++) {
                        var p = false;

                        if ($.metadata && ($($headers[i]).metadata() && $($headers[i]).metadata().sorter)) {

                            p = getParserById($($headers[i]).metadata().sorter);

                        } else if ((table.config.headers[i] && table.config.headers[i].sorter)) {

                            p = getParserById(table.config.headers[i].sorter);
                        }
                        if (!p) {
                            p = detectParserForColumn(table, cells[i]);
                        }

                        if (table.config.debug) { parsersDebug += "column:" + i + " parser:" + p.id + "\n"; }

                        list.push(p);
                    }
                }

                if (table.config.debug) { log(parsersDebug); }

                return list;
            };

            function detectParserForColumn(table, node) {
                var l = parsers.length;
                for (var i = 1; i < l; i++) {
                    if (parsers[i].is($.trim(getElementText(table.config, node)), table, node)) {
                        return parsers[i];
                    }
                }
                // 0 is always the generic parser (text)
                return parsers[0];
            }

            function getParserById(name) {
                var l = parsers.length;
                for (var i = 0; i < l; i++) {
                    if (parsers[i].id.toLowerCase() == name.toLowerCase()) {
                        return parsers[i];
                    }
                }
                return false;
            }

            /* utils */
            function buildCache(table) {

                if (table.config.debug) { var cacheTime = new Date(); }


                var totalRows = (table.tBodies[0] && table.tBodies[0].rows.length) || 0,
					totalCells = (table.tBodies[0].rows[0] && table.tBodies[0].rows[0].cells.length) || 0,
					parsers = table.config.parsers,
					cache = { row: [], normalized: [] };

                for (var i = 0; i < totalRows; ++i) {

                    /** Add the table data to main data array */
                    var c = table.tBodies[0].rows[i], cols = [];

                    cache.row.push($(c));

                    for (var j = 0; j < totalCells; ++j) {
                        cols.push(parsers[j].format(getElementText(table.config, c.cells[j]), table, c.cells[j]));
                    }

                    cols.push(i); // add position for rowCache
                    cache.normalized.push(cols);
                    cols = null;
                };

                if (table.config.debug) { benchmark("Building cache for " + totalRows + " rows:", cacheTime); }

                return cache;
            };

            function getElementText(config, node) {

                if (!node) return "";

                var t = "";

                if (config.textExtraction == "simple") {
                    if (node.childNodes[0] && node.childNodes[0].hasChildNodes()) {
                        t = node.childNodes[0].innerHTML;
                    } else {
                        t = node.innerHTML;
                    }
                } else {
                    if (typeof (config.textExtraction) == "function") {
                        t = config.textExtraction(node);
                    } else {
                        t = $(node).text();
                    }
                }
                return t;
            }

            function appendToTable(table, cache) {

                if (table.config.debug) { var appendTime = new Date() }

                var c = cache,
					r = c.row,
					n = c.normalized,
					totalRows = n.length,
					checkCell = (n[0].length - 1),
					tableBody = $(table.tBodies[0]),
					rows = [];

                for (var i = 0; i < totalRows; i++) {
                    rows.push(r[n[i][checkCell]]);
                    if (!table.config.appender) {

                        var o = r[n[i][checkCell]];
                        var l = o.length;
                        for (var j = 0; j < l; j++) {

                            tableBody[0].appendChild(o[j]);

                        }

                        //tableBody.append(r[n[i][checkCell]]);
                    }
                }

                if (table.config.appender) {

                    table.config.appender(table, rows);
                }

                rows = null;

                if (table.config.debug) { benchmark("Rebuilt table:", appendTime); }

                //apply table widgets
                applyWidget(table);

                // trigger sortend
                setTimeout(function () {
                    $(table).trigger("sortEnd");
                }, 0);

            };

            function buildHeaders(table) {

                if (table.config.debug) { var time = new Date(); }

                var meta = ($.metadata) ? true : false, tableHeadersRows = [];

                for (var i = 0; i < table.tHead.rows.length; i++) { tableHeadersRows[i] = 0; };

                $tableHeaders = $("thead th", table);

                $tableHeaders.each(function (index) {

                    this.count = 0;
                    this.column = index;
                    this.order = formatSortingOrder(table.config.sortInitialOrder);

                    if (checkHeaderMetadata(this) || checkHeaderOptions(table, index)) this.sortDisabled = true;

                    if (!this.sortDisabled) {
                        $(this).addClass(table.config.cssHeader);
                    }

                    // add cell to headerList
                    table.config.headerList[index] = this;
                });

                if (table.config.debug) { benchmark("Built headers:", time); log($tableHeaders); }

                return $tableHeaders;

            };

            function checkCellColSpan(table, rows, row) {
                var arr = [], r = table.tHead.rows, c = r[row].cells;

                for (var i = 0; i < c.length; i++) {
                    var cell = c[i];

                    if (cell.colSpan > 1) {
                        arr = arr.concat(checkCellColSpan(table, headerArr, row++));
                    } else {
                        if (table.tHead.length == 1 || (cell.rowSpan > 1 || !r[row + 1])) {
                            arr.push(cell);
                        }
                        //headerArr[row] = (i+row);
                    }
                }
                return arr;
            };

            function checkHeaderMetadata(cell) {
                if (($.metadata) && ($(cell).metadata().sorter === false)) { return true; };
                return false;
            }

            function checkHeaderOptions(table, i) {
                if ((table.config.headers[i]) && (table.config.headers[i].sorter === false)) { return true; };
                return false;
            }

            function applyWidget(table) {
                var c = table.config.widgets;
                var l = c.length;
                for (var i = 0; i < l; i++) {

                    getWidgetById(c[i]).format(table);
                }

            }

            function getWidgetById(name) {
                var l = widgets.length;
                for (var i = 0; i < l; i++) {
                    if (widgets[i].id.toLowerCase() == name.toLowerCase()) {
                        return widgets[i];
                    }
                }
            };

            function formatSortingOrder(v) {

                if (typeof (v) != "Number") {
                    i = (v.toLowerCase() == "desc") ? 1 : 0;
                } else {
                    i = (v == (0 || 1)) ? v : 0;
                }
                return i;
            }

            function isValueInArray(v, a) {
                var l = a.length;
                for (var i = 0; i < l; i++) {
                    if (a[i][0] == v) {
                        return true;
                    }
                }
                return false;
            }

            function setHeadersCss(table, $headers, list, css) {
                // remove all header information
                $headers.removeClass(css[0]).removeClass(css[1]);

                var h = [];
                $headers.each(function (offset) {
                    if (!this.sortDisabled) {
                        h[this.column] = $(this);
                    }
                });

                var l = list.length;
                for (var i = 0; i < l; i++) {
                    h[list[i][0]].addClass(css[list[i][1]]);
                }
            }

            function fixColumnWidth(table, $headers) {
                var c = table.config;
                if (c.widthFixed) {
                    var colgroup = $('<colgroup>');
                    $("tr:first td", table.tBodies[0]).each(function () {
                        colgroup.append($('<col>').css('width', $(this).width()));
                    });
                    $(table).prepend(colgroup);
                };
            }

            function updateHeaderSortCount(table, sortList) {
                var c = table.config, l = sortList.length;
                for (var i = 0; i < l; i++) {
                    var s = sortList[i], o = c.headerList[s[0]];
                    o.count = s[1];
                    o.count++;
                }
            }

            /* sorting methods */
            function multisort(table, sortList, cache) {

                if (table.config.debug) { var sortTime = new Date(); }

                var dynamicExp = "var sortWrapper = function(a,b) {", l = sortList.length;

                for (var i = 0; i < l; i++) {

                    var c = sortList[i][0];
                    var order = sortList[i][1];
                    var s = (getCachedSortType(table.config.parsers, c) == "text") ? ((order == 0) ? "sortText" : "sortTextDesc") : ((order == 0) ? "sortNumeric" : "sortNumericDesc");

                    var e = "e" + i;

                    dynamicExp += "var " + e + " = " + s + "(a[" + c + "],b[" + c + "]); ";
                    dynamicExp += "if(" + e + ") { return " + e + "; } ";
                    dynamicExp += "else { ";
                }

                // if value is the same keep orignal order	
                var orgOrderCol = cache.normalized[0].length - 1;
                dynamicExp += "return a[" + orgOrderCol + "]-b[" + orgOrderCol + "];";

                for (var i = 0; i < l; i++) {
                    dynamicExp += "}; ";
                }

                dynamicExp += "return 0; ";
                dynamicExp += "}; ";

                eval(dynamicExp);

                cache.normalized.sort(sortWrapper);

                if (table.config.debug) { benchmark("Sorting on " + sortList.toString() + " and dir " + order + " time:", sortTime); }

                return cache;
            };

            function sortText(a, b) {
                return ((a < b) ? -1 : ((a > b) ? 1 : 0));
            };

            function sortTextDesc(a, b) {
                return ((b < a) ? -1 : ((b > a) ? 1 : 0));
            };

            function sortNumeric(a, b) {
                return a - b;
            };

            function sortNumericDesc(a, b) {
                return b - a;
            };

            function getCachedSortType(parsers, i) {
                return parsers[i].type;
            };

            /* public methods */
            this.construct = function (settings) {

                return this.each(function () {

                    if (!this.tHead || !this.tBodies) return;

                    var $this, $document, $headers, cache, config, shiftDown = 0, sortOrder;

                    this.config = {};

                    config = $.extend(this.config, $.tablesorter.defaults, settings);

                    // store common expression for speed					
                    $this = $(this);

                    // build headers
                    $headers = buildHeaders(this);

                    // try to auto detect column type, and store in tables config
                    this.config.parsers = buildParserCache(this, $headers);


                    // build the cache for the tbody cells
                    cache = buildCache(this);

                    // get the css class names, could be done else where.
                    var sortCSS = [config.cssDesc, config.cssAsc];

                    // fixate columns if the users supplies the fixedWidth option
                    fixColumnWidth(this);

                    // apply event handling to headers
                    // this is to big, perhaps break it out?

                    $headers.click(function (e) {

                        $this.trigger("sortStart");

                        var totalRows = ($this[0].tBodies[0] && $this[0].tBodies[0].rows.length) || 0;

                        if (!this.sortDisabled && totalRows > 0) {


                            // store exp, for speed
                            var $cell = $(this);

                            // get current column index
                            var i = this.column;

                            // get current column sort order
                            this.order = this.count++ % 2;

                            // user only whants to sort on one column
                            if (!e[config.sortMultiSortKey]) {

                                // flush the sort list
                                config.sortList = [];

                                if (config.sortForce != null) {
                                    var a = config.sortForce;
                                    for (var j = 0; j < a.length; j++) {
                                        if (a[j][0] != i) {
                                            config.sortList.push(a[j]);
                                        }
                                    }
                                }

                                // add column to sort list
                                config.sortList.push([i, this.order]);

                                // multi column sorting
                            } else {
                                // the user has clicked on an all ready sortet column.
                                if (isValueInArray(i, config.sortList)) {

                                    // revers the sorting direction for all tables.
                                    for (var j = 0; j < config.sortList.length; j++) {
                                        var s = config.sortList[j], o = config.headerList[s[0]];
                                        if (s[0] == i) {
                                            o.count = s[1];
                                            o.count++;
                                            s[1] = o.count % 2;
                                        }
                                    }
                                } else {
                                    // add column to sort list array
                                    config.sortList.push([i, this.order]);
                                }
                            };
                            setTimeout(function () {
                                //set css for headers
                                setHeadersCss($this[0], $headers, config.sortList, sortCSS);
                                appendToTable($this[0], multisort($this[0], config.sortList, cache));
                            }, 1);
                            // stop normal event by returning false
                            return false;
                        }
                        // cancel selection	
                    }).mousedown(function () {
                        if (config.cancelSelection) {
                            this.onselectstart = function () { return false };
                            return false;
                        }
                    });

                    // apply easy methods that trigger binded events
                    $this.bind("update", function () {

                        // rebuild parsers.
                        this.config.parsers = buildParserCache(this, $headers);

                        // rebuild the cache map
                        cache = buildCache(this);

                    }).bind("sorton", function (e, list) {

                        $(this).trigger("sortStart");

                        config.sortList = list;

                        // update and store the sortlist
                        var sortList = config.sortList;

                        // update header count index
                        updateHeaderSortCount(this, sortList);

                        //set css for headers
                        setHeadersCss(this, $headers, sortList, sortCSS);


                        // sort the table and append it to the dom
                        appendToTable(this, multisort(this, sortList, cache));

                    }).bind("appendCache", function () {

                        appendToTable(this, cache);

                    }).bind("applyWidgetId", function (e, id) {

                        getWidgetById(id).format(this);

                    }).bind("applyWidgets", function () {
                        // apply widgets
                        applyWidget(this);
                    });

                    if ($.metadata && ($(this).metadata() && $(this).metadata().sortlist)) {
                        config.sortList = $(this).metadata().sortlist;
                    }
                    // if user has supplied a sort list to constructor.
                    if (config.sortList.length > 0) {
                        $this.trigger("sorton", [config.sortList]);
                    }

                    // apply widgets
                    applyWidget(this);
                });
            };

            this.addParser = function (parser) {
                var l = parsers.length, a = true;
                for (var i = 0; i < l; i++) {
                    if (parsers[i].id.toLowerCase() == parser.id.toLowerCase()) {
                        a = false;
                    }
                }
                if (a) { parsers.push(parser); };
            };

            this.addWidget = function (widget) {
                widgets.push(widget);
            };

            this.formatFloat = function (s) {
                var i = parseFloat(s);
                return (isNaN(i)) ? 0 : i;
            };
            this.formatInt = function (s) {
                var i = parseInt(s);
                return (isNaN(i)) ? 0 : i;
            };

            this.isDigit = function (s, config) {
                var DECIMAL = '\\' + config.decimal;
                var exp = '/(^[+]?0(' + DECIMAL + '0+)?$)|(^([-+]?[1-9][0-9]*)$)|(^([-+]?((0?|[1-9][0-9]*)' + DECIMAL + '(0*[1-9][0-9]*)))$)|(^[-+]?[1-9]+[0-9]*' + DECIMAL + '0+$)/';
                return RegExp(exp).test($.trim(s));
            };

            this.clearTableBody = function (table) {
                if ($.browser.msie) {
                    function empty() {
                        while (this.firstChild) this.removeChild(this.firstChild);
                    }
                    empty.apply(table.tBodies[0]);
                } else {
                    table.tBodies[0].innerHTML = "";
                }
            };
        }
    });

    // extend plugin scope
    $.fn.extend({
        tablesorter: $.tablesorter.construct
    });

    var ts = $.tablesorter;

    // add default parsers
    ts.addParser({
        id: "text",
        is: function (s) {
            return true;
        },
        format: function (s) {
            return $.trim(s.toLowerCase());
        },
        type: "text"
    });

    ts.addParser({
        id: "digit",
        is: function (s, table) {
            var c = table.config;
            return $.tablesorter.isDigit(s, c);
        },
        format: function (s) {
            return $.tablesorter.formatFloat(s);
        },
        type: "numeric"
    });

    ts.addParser({
        id: "currency",
        is: function (s) {
            return /^[Â£$â‚¬?.]/.test(s);
        },
        format: function (s) {
            return $.tablesorter.formatFloat(s.replace(new RegExp(/[^0-9.]/g), ""));
        },
        type: "numeric"
    });

    ts.addParser({
        id: "ipAddress",
        is: function (s) {
            return /^\d{2,3}[\.]\d{2,3}[\.]\d{2,3}[\.]\d{2,3}$/.test(s);
        },
        format: function (s) {
            var a = s.split("."), r = "", l = a.length;
            for (var i = 0; i < l; i++) {
                var item = a[i];
                if (item.length == 2) {
                    r += "0" + item;
                } else {
                    r += item;
                }
            }
            return $.tablesorter.formatFloat(r);
        },
        type: "numeric"
    });

    ts.addParser({
        id: "url",
        is: function (s) {
            return /^(https?|ftp|file):\/\/$/.test(s);
        },
        format: function (s) {
            return jQuery.trim(s.replace(new RegExp(/(https?|ftp|file):\/\//), ''));
        },
        type: "text"
    });

    ts.addParser({
        id: "isoDate",
        is: function (s) {
            return /^\d{4}[\/-]\d{1,2}[\/-]\d{1,2}$/.test(s);
        },
        format: function (s) {
            return $.tablesorter.formatFloat((s != "") ? new Date(s.replace(new RegExp(/-/g), "/")).getTime() : "0");
        },
        type: "numeric"
    });

    ts.addParser({
        id: "percent",
        is: function (s) {
            return /\%$/.test($.trim(s));
        },
        format: function (s) {
            return $.tablesorter.formatFloat(s.replace(new RegExp(/%/g), ""));
        },
        type: "numeric"
    });

    ts.addParser({
        id: "usLongDate",
        is: function (s) {
            return s.match(new RegExp(/^[A-Za-z]{3,10}\.? [0-9]{1,2}, ([0-9]{4}|'?[0-9]{2}) (([0-2]?[0-9]:[0-5][0-9])|([0-1]?[0-9]:[0-5][0-9]\s(AM|PM)))$/));
        },
        format: function (s) {
            return $.tablesorter.formatFloat(new Date(s).getTime());
        },
        type: "numeric"
    });

    ts.addParser({
        id: "shortDate",
        is: function (s) {
            return /\d{1,2}[\/\-]\d{1,2}[\/\-]\d{2,4}/.test(s);
        },
        format: function (s, table) {
            var c = table.config;
            s = s.replace(/\-/g, "/");
            if (c.dateFormat == "us") {
                // reformat the string in ISO format
                s = s.replace(/(\d{1,2})[\/\-](\d{1,2})[\/\-](\d{4})/, "$3/$1/$2");
            } else if (c.dateFormat == "uk") {
                //reformat the string in ISO format
                s = s.replace(/(\d{1,2})[\/\-](\d{1,2})[\/\-](\d{4})/, "$3/$2/$1");
            } else if (c.dateFormat == "dd/mm/yy" || c.dateFormat == "dd-mm-yy") {
                s = s.replace(/(\d{1,2})[\/\-](\d{1,2})[\/\-](\d{2})/, "$1/$2/$3");
            }
            return $.tablesorter.formatFloat(new Date(s).getTime());
        },
        type: "numeric"
    });

    ts.addParser({
        id: "time",
        is: function (s) {
            return /^(([0-2]?[0-9]:[0-5][0-9])|([0-1]?[0-9]:[0-5][0-9]\s(am|pm)))$/.test(s);
        },
        format: function (s) {
            return $.tablesorter.formatFloat(new Date("2000/01/01 " + s).getTime());
        },
        type: "numeric"
    });


    ts.addParser({
        id: "metadata",
        is: function (s) {
            return false;
        },
        format: function (s, table, cell) {
            var c = table.config, p = (!c.parserMetadataName) ? 'sortValue' : c.parserMetadataName;
            return $(cell).metadata()[p];
        },
        type: "numeric"
    });

    // add default widgets
    ts.addWidget({
        id: "zebra",
        format: function (table) {
            if (table.config.debug) { var time = new Date(); }
            $("tr:visible", table.tBodies[0])
	        .filter(':even')
	        .removeClass(table.config.widgetZebra.css[1]).addClass(table.config.widgetZebra.css[0])
	        .end().filter(':odd')
	        .removeClass(table.config.widgetZebra.css[0]).addClass(table.config.widgetZebra.css[1]);
            if (table.config.debug) { $.tablesorter.benchmark("Applying Zebra widget", time); }
        }
    });
})(jQuery);